Remember the invisible gorilla video?

In an experiment popularized by the book of the same name, volunteers were told to keep track of how many times a basketball was passed between players. While the ball was being tossed, someone in a gorilla suit walked between them in plain view. Very few people noticed the gorilla because they were so focused on counting the passes.

The invisible gorilla study is the most famous example of a phenomenom called “inattentional blindness.” When we pay close attention to one thing, we often fail to notice other things – even if they are obvious. The authors of the book modified the original video to reinforce the point.  Watch the updated video to see if you notice anything unusual:

If you’re like most people – including me – you didn’t notice the person leaving the game or the background curtains change color.  You…